Cloud Migration of ATG E-commerce to GCP: Process, challenges, and outcomes of migrating an ATG-based e-commerce application to Google Cloud

Cloud migration projects are increasingly vital for modernizing legacy applications and enhancing business agility. This paper examines the comprehensive process of migrating an ATG-based e-commerce application to Google Cloud Platform (GCP). The migration strategy encompassed thorough planning, analysis, and implementation stages that addressed key aspects of scalability, performance optimization, and security enhancement. Initially, a detailed assessment of the existing ATG framework identified potential bottlenecks and compatibility issues with cloud environments. Subsequently, a robust migration roadmap was developed to mitigate risks and ensure a seamless transition, emphasizing data integrity and minimal service disruption. The process involved refactoring monolithic components into microservices, integrating containerization technologies, and leveraging GCP’s advanced orchestration, monitoring, and automation tools. Throughout the migration journey, several challenges emerged, including legacy code dependencies, integration complexities, and the necessity to comply with stringent industry standards. Addressing these obstacles required iterative testing, close stakeholder collaboration, and agile project management practices. Ultimately, the outcomes demonstrated improved operational efficiency, enhanced system resilience, and a significant reduction in infrastructure costs. Furthermore, the transition enabled the e-commerce platform to capitalize on cloud-native features such as dynamic scaling